mirror of
https://github.com/gravitational/teleport.git
synced 2026-11-02 23:31:08 +08:00
rosstimothy
b7318b5c7e
Adds the new linter and configures it to prevent direct error comparisions and type assertions in favor of errors.Is and errors.As. All current violations caught by the linter have been updated accordingly.
98 lines
2.4 KiB
Go
98 lines
2.4 KiB
Go
/*
|
|
* Teleport
|
|
* Copyright (C) 2023 Gravitational, Inc.
|
|
*
|
|
* This program is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU Affero General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU Affero General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Affero General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
package sftp
|
|
|
|
import (
|
|
"context"
|
|
"errors"
|
|
"io"
|
|
"io/fs"
|
|
"os"
|
|
)
|
|
|
|
// fileWrapper provides minimal required file interface for SFTP package
|
|
// including WriteTo() method required for concurrent data transfer.
|
|
type fileWrapper struct {
|
|
file *os.File
|
|
}
|
|
|
|
func (wt *fileWrapper) Read(p []byte) (n int, err error) {
|
|
return wt.file.Read(p)
|
|
}
|
|
|
|
func (wt *fileWrapper) Close() error {
|
|
return wt.file.Close()
|
|
}
|
|
|
|
func (wt *fileWrapper) WriteTo(w io.Writer) (n int64, err error) {
|
|
return io.Copy(w, wt.file)
|
|
}
|
|
|
|
func (wt *fileWrapper) Stat() (os.FileInfo, error) {
|
|
return wt.file.Stat()
|
|
}
|
|
|
|
// fileStreamReader is a thin wrapper around fs.File with additional streams.
|
|
type fileStreamReader struct {
|
|
ctx context.Context
|
|
streams []io.Reader
|
|
file fs.File
|
|
}
|
|
|
|
// Stat returns file stats.
|
|
func (r *fileStreamReader) Stat() (os.FileInfo, error) {
|
|
return r.file.Stat()
|
|
}
|
|
|
|
// Read reads the data from a file and passes the read data to all readers.
|
|
// All errors from stream are returned except io.EOF.
|
|
func (r *fileStreamReader) Read(b []byte) (int, error) {
|
|
if err := r.ctx.Err(); err != nil {
|
|
return 0, err
|
|
}
|
|
|
|
n, err := r.file.Read(b)
|
|
// Create a copy as not whole buffer can be filled.
|
|
readBuff := b[:n]
|
|
|
|
for _, stream := range r.streams {
|
|
if _, innerError := stream.Read(readBuff); innerError != nil {
|
|
// Ignore EOF
|
|
if !errors.Is(err, io.EOF) {
|
|
return 0, innerError
|
|
}
|
|
}
|
|
}
|
|
|
|
return n, err
|
|
}
|
|
|
|
// cancelWriter implements io.Writer interface with context cancellation.
|
|
type cancelWriter struct {
|
|
ctx context.Context
|
|
stream io.Writer
|
|
}
|
|
|
|
func (c *cancelWriter) Write(b []byte) (int, error) {
|
|
if err := c.ctx.Err(); err != nil {
|
|
return 0, err
|
|
}
|
|
return c.stream.Write(b)
|
|
}
|